I found one Medical Calculator app called Med Cal Pro today in app catlog.

This Med Cal Pro application having all most all useful medical calculators like
1. Anion Gap,
2. APGAR Score,
3. Blood Donation Time Calculation,
4. Blood Volume Calculator,
5. Body Surface Area Calculation Using DuBois Formula,
6. Body Surface Area Calculation Using Mosteller formula,
7. Calories Needs Per Day Calculation,
8. Diabetes Mellitus Criteria (ADA) Diagnosis
9.International Normalized Ration (INR) Calculation
10.Calories Consumption Calculation
11.Pulmonary Vascular Resistance (PVR) Calculation
12.IBW & ABW
13.Blood Alcohol Content
14.Blood Sugar / A1C Calculator

For more details click here to view the app